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ADOLPHE GAUDRQN, OF DETROIT, MICHIGAN.

Letters Pctmt N 93,873, dated August 17, 1869.

IMPROVEMENT 4:EN SAWINGMACHINES.

The Schedule referred to in these Letters Patent and making part of thesama.

thawingtgs,4 and to the letters of reference markedthereon, making apart of' this speciiication. i

The nature of my invention is the combination of the machinery forfeeding and raising thesaws', when the logz, is cut, and the arrangementof the deg gra-spint,y the log on the horse.

io enable others skilled in the art to make. and use my invention, lwill proceed to describe its construction and operation.

My machine is constructed oi' a wood frame, A, to

which the machinery is fixed, and arranged to` work with 'two sani-ns,one on each side. l

A motive-wheel, B; is placed inside ofthe frame A, mounted on a shai't,l, projecting from both sides of the frame, to which is adapted aerank,C, to he'worked by hand. l

'.ihere are a ily-wheel, l, and pulley, E, mounted on the sha-it ii',with a crank, l?, at each end, giving Inot 'in the saws H amil-l', bymeans of the. connectlct I transmits motion from the wheel B to F,which, by the connecting-rods G G', the oscillating; motion to the sawsH H', n ich are attaclnid to the frame J J', mounted on a pioieotingcentre-pin, K. (See section, Figures 5, i; f"

.ihe pin'I" works in a frame, L, slidin between two siid'is, M M',inside ot' which is a ratchet-br.

y '.iwo pawis, N N, work on a pin iixd t ,the piece i), screwed throughthe middle ot'- the centre-piti ',lv". 'The piece tl) can be raised orlowered, to `regulate motion ot" the pawls with `the ratchetsaecordingto the oscillation of the saws. v J* u n., plat-e7 P, with an obronr,rslot, slides up ,and down in. two pins, Q Q'. l. le plate i?, by goingup, throws out the pawls' N er the zts with the two pins R It'. Bycoming der. i, the -jaw-i." )i E become free, and the spring S' I willdescribe the use of the dog` a, Figures l, 2, intended to grasp the logon the horse.

By pulling the handle b, the teeth of the ratchet c catch the hook d,lFigures 2, Si.

As soon as ready to pnt on another log, by pressing with the foot on.the treadle c e', it pulls down the hook d, by the wire j, and theratchet-bar is free.

The spring r/ brings back the arm of the dog; a.

A spring, 11,'keeps np the hook d.

N ow I will explain how to Work with my machine.

lt can be worked with the two saws at once, or one after the other,without lremoving any piece.

The space between the saws is sixteen inches, d1- viding the log ofcord-wood in three.

llt' only one out is required, the middleofthe log is pnt under one ofthe saws.

The first operation is to put the 10g on the horse; then, to pull thehandle l) ot'y the dog a, enough to grasp the log firmly.

The second operation is, after taking hold of the hand-crank iJ with onehand, to hegiii motion of the saws, to push the upper arm of thebell-crank U, in order to drop the saw on the log as soon as the plate lis brought down, by means oi' the inclined bar '.l.

'lhe notch Y catches the pin4 Q, tig. 5, and the papis N N fall in theratchets.

The machine being put in 1notion,=theoscillation of the saws transmitsmot-ion to the centre-pin K, and the pawls will catch the teeth of theratchets, one after the other, bringing down the sa\vs, unt-il it haspassed the loo".

Then the lower part of the plate P, which is rounded, strikes againstthe dog Z, lig. 2, which throws the notch Y ont of the pin Q, by pushingit to the opposite side.

At the same moment the spring X pulls the upper arm of the bell-crank U,which raises the pla-te P, by means of the bar T. In the mean time thepins It It throw the pawls N N out of the ratchet-teeth, and the springX, by pulling, raises the saws freely to their upper position, ready tobegin again.

Ill/'hat I claim as my invention, and desire-to--secure by LettersPatent, is*- 1. The apparatus by which the saws are raised when thecutting is done, constructed and operatinr as herein set forth.

2. The conneeting-rod G, in combination with the saws H H', their framesJ J', the different pieces on 'the plates P and L, connecting-rod l thebell-crank U, the bars V, with their springs X, all constructedsubstantially as herein set forth.

3. The dog a, in combination with the pieces c d and ef h g, constructedin the manner herein shown and described.

Witnesses:

WLLLIAM TILLMAN, WILLIAM H. ALLEN.

A. GA'UDRO.

